12021010009 has 2 divisors, whose sum is σ = 12021010010. Its totient is φ = 12021010008.

The previous prime is 12021009997. The next prime is 12021010013. The reversal of 12021010009 is 90001012021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10045651984 + 1975358025 = 100228^2 + 44445^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021010009 - 2⁷ = 12021009881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021009974 and 12021010001.

It is not a weakly prime, because it can be changed into another prime (12021010409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6010505004 + 6010505005.

It is an arithmetic number, because the mean of its divisors is an integer number (6010505005).

Almost surely, 2^12021010009 is an apocalyptic number.

It is an amenable number.

12021010009 is a deficient number, since it is larger than the sum of its proper divisors (1).

12021010009 is an equidigital number, since it uses as much as digits as its factorization.

12021010009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 12021010009 in words is "twelve billion, twenty-one million, ten thousand, nine".